“…In the majority of cases, sample pretreatment consisted of deproteinization. The removal of proteins was performed using organic solvents (acetonitrile—ceritinib [ 74 ], erlotinib [ 47 ], gefitinib [ 45 ], ibrutinib [ 85 , 86 ], imatinib [ 16 , 20 , 21 , 22 ], ponatinib [ 37 ], regorafenib [ 89 ], ribociclib [ 78 , 79 ], vemurafenib [ 68 ], venetoclax [ 95 ], zanubrutinib [ 86 ]; acetonitrile-methanol 1:1—dasatinib [ 27 ], imatinib [ 14 ], nilotinib [ 32 , 33 , 34 , 36 ]; acetonitrile-methanol 1:4—erlotinib [ 54 ]; acetonitrile-methanol 10:1—zanubrutinib [ 87 ]; methanol—alectinib [ 76 ], dabrafenib [ 69 ], dasatinib [ 12 ], erlotinib [ 46 ], nintedanib [ 12 ], panobinosat [ 12 ], regorafenib [ 12 ], ribociclib [ 12 ], trametinib [ 69 ], vorinostat [ 12 ]), and, in a single case, the aqueous dilution of perchloric acid (imatinib [ 18 ]). The deproteinization methodology was not described by Xing et al for the monitoring of osimertinib in CSF [ 63 ].…”